I wanted to share in case anyone else is fascinated by this!
There's a new documentary film about an early 1960's theme park that didn't get past the design phase but looked very similar to Disneyland - instead of the Jungle Cruise, they had the Garden of Eden Cruise. Instead of the Frontierland Shooting Gallery, they had the David & Goliath Slingshot gallery. Instead of Peter Pan's Flight, they had the Flight to Heaven.
Former Disney VP Nat Winecoff was behind the project. Also Jack Haley and Donald Duncan (of Duncan Yo-yos)